-6x2 +9x -3 = 0
ax2 bx c = 0
a = -6
b = 9
c = -3
Δ = b2-4ac
Δ = 9² - (4 * -6 * -3)
Δ = 81 - (4*18)
Δ = 81 - (72)
Δ = 9 Δ > 0
-6x2+9x-3=0
x = -b ∓ √Δ 2a
x' = -9 - √9 2*-6 = -9 - 3.0 -12 = -12.0 -12 = 1.0
x" = -9 + √9 2*-6 = -9 + 3.0 -12 = -6.0 -12 = 0.5
x' = 36.0
x" = 18.0
S = {x ∈ R / x' = 36.0, x" = 18.0 }